1 files changed, 6 insertions, 2 deletions
diff --git a/src/map.c b/src/map.c
index c86aa1b..2ecf063 100644
--- a/src/map.c
+++ b/src/map.c
@@ -439,7 +439,9 @@ map_match(struct plugin_state *state,
 	*value_len = 0;
 	*value = NULL;
 	*id = NULL;
-	*backend_data = NULL;
+	if (backend_data != NULL) {
+		*backend_data = NULL;
+	}
 	map = map_data_find_map(state, domain_name, map_name);
 	if (map == NULL) {
 		return FALSE;
@@ -474,7 +476,9 @@ map_match_id(struct plugin_state *state,
 	*value_len = 0;
 	*value = NULL;
 	*id = NULL;
-	*backend_data = NULL;
+	if (backend_data != NULL) {
+		*backend_data = NULL;
+	}
 	map = map_data_find_map(state, domain_name, map_name);
 	if (map == NULL) {
 		return FALSE;